Exercise device



FIG. 1 is a top plan view of an exercise device showing our new design therefore;

FIG. 2 is a front elevational view thereof, the rear elevational view being identical thereto;

FIG. 3 is a right side elevational view thereof, the left side elevational view being identical thereto;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front, right, top perspective view thereof. 

The ornamental design for an exercise device, as shown and described. 